I would like to ask: in high-salt wastewater systems such as those containing sodium sulfate, potassium sulfate, and sulfuric acid, what could be the reasons for crystals forming on the surface of the solid phase?
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I would like to ask: in high-salt wastewater systems such as those containing sodium sulfate, potassium sulfate, and sulfuric acid, what could be the reasons for crystals forming on the surface of the solid phase? This crystal cannot be washed away with hot water; it can be removed using hot alcohol, but it will immediately block the pipes. Is there any good solution?
By providing heat tracing to the wastewater pipes and preventing the wastewater temperature from dropping, crystallization will not occur
The area in question is also insulated, so the temperature doesn’t drop, but that doesn’t help much. It might be an organic crystal that gradually crystallizes and precipitates on the surface of the solid phase
Is it the turbulent part of the pipe that crystallizes easily?
1: Smooth pipe surface 2: Use non-metallic pipes 3: Increase flow velocity 4: Reduce horizontal piping
Highly saturated saltwater tends to cause salt crystallization within the delivery pipes (the problem is more severe at high concentrations and in winter)； In the concentration system, salt precipitation also occurs due to supersaturation resulting from evaporation. Solution: Install dual lines in long-distance pipelines, switch between them regularly for cleaning (cyclic cleaning is also possible) ； For metal pipes, ultrasonic anti-scaling can be considered (there are posts on the forum regarding its applications) ； Desalination is carried out. Scale inhibitors can be considered for addition to the concentration system.
Solution: 1. Add heat tracing to prevent cooling-induced crystallization and to avoid crystallization-induced hardening over time. 2. Increase pipeline power transmission. Ensure the pipes are unobstructed. 3. Appropriately increase the pipe size; a rigid installation method is beneficial for discharging. 4. Increase monitoring of pipelines under pressure, as well as flushing and cleaning to address potential issues in advance. 5. The remaining step is to add scale inhibitors to slow down the process.
The main reason is the change in temperature
Potassium sulfate has very low solubility, and it melts slowly after crystallization